Gas Side Pressure Drop - Riello 20122858 Installation, Use And Maintenance Instructions

4.11

Gas side pressure drop

Gas pressure on the basis of the maximum output developed by
the burner is given by the curves in Fig. 6.
It represents the pressure drop in the combustion head.
Natural gas G 20 - N.C.V.. = 10 kWh/Nm
The curves were taken in the following conditions:
– pressure measured at the test point on the pressure switch
downstream from the gas butterfly valve;
– combustion chamber at 0 mbar;
– burner working at full output.
Combustion head pressure drop
Butterfly valve pressure drop
20118862
Technical description of the burner
3
28
24
20
16
12
8
4
0
300 600 900
10
8
6
4
2
1
0
300 600 900
Potenza bruciatore Pb [kW]
Add the pressure of the combustion chamber in
mbar to the value of the combustion head drop.
WARNING
The pressure drop of the completely open butterfly valve is given
in Fig. 7.
1200 1500 1800
Burner output Pb [kW]
1200 1500 1800
12 GB
20107630
kW
2100 2400
20107648
kW
2100 2400
Fig. 6
Fig. 7